Deburring tool



C. F. QUIROLO DEBURRING TOOL Nov, 16, 1954 Filed Dec. 24, 1951 FIG. 3

zzvmvroze. CHARLES F. QUIROLO FIG.5

ATTORNEY United States Patent DEBURRING TooL Charles F. Quirolo, LosAngeles, (Ialitl, assignor to North American Aviation, Inc.

Application December 24, 1951, Serial No. 263,094

6 Claims. (Cl. 90-24) When holes are drilled in metal parts a burr isnormally left projecting upwardly around the drilled hole. It becomesnecessary to remove this burr so that parts can properly mate together.When the drilling operation is on formed parts, such as parts having aflange thereon, there has been no tool or machine for automaticallyremoving the burrs from these parts. Heretofore the only suitable methodof removing burrs has been by laborious timeconsuming hand work.

Therefore, it is an object of this invention to automatically removeburrs from material.

Another object of this invention is to provide a tool for removing burrsfrom formed parts.

An additional object of this invention is to provide a tool for removingburrs that is fast, automatic and economical in its operation,eliminating hand work.

These and other objects of this invention will become apparent from thefollowing description taken in connection with the accompanyingdrawings, in which Fig. l is a side elevation of the deburring toolcomprising this invention, b1Fdig. 2 is a fragmentary perspective viewof a cutting Fig. 3 is a side elevation, partly in section, of a cuttingblade contacting a work-piece,

Fig. 4 is a side elevation, partly in section, of a blade during removalof a burr,

Fig. 5 is a bottom elevation of the supporting base showingadjustability of the blades, and

Fig. 6 is a side elevation, partly in section, of a blade contacting acurved work-piece.

The deburring tool 1 of this invention requires a moveable platenelement 2 and a stationary bed 3. Platen 2 may be operated in anysuitable manner such as by a hydraulic cylinder (not shown). Asupporting base member 5 is secured to and carried by platen 2 in asuitable manner such as by bolts 6. Depending downwardly from basemember 5 are a plurality of blades 7 which may be held to base 5 bymeans of screws 8 passing through openings in attaching portion 9 of theblades. The blades are in this m nner carried with shank portion 10 atan angle other than 90 with respect to the upper surface of a workpiece11 and are preferably at approximately the angle shown which is in thenei hborhood of 45. Blades 7 sh uld be of resi ient material.

Outer end 12 of each blade 7 includes turned up tip p rti ns 13 whi h shu inclu e a curved surface at 14, the lowerm st p rti n of the blade. Atthe b se of tips 13 and opp site the location of the curved surfa es 14of outer end 12, is a sharpened cutting edge 15. This constructi n maybest be seen by reference to Fig. 2.

Workiece 11 is suitably p sitioned beneath platen 2, and the s. F ex e.the work-pie e may rest on a supporti block 16 hi h in turn is carriedby stationary bed 3. The supporting b ck may be held in place by meansof clamps 17 attached to the stationary bed by me ns f s re s 8. Wrk-niece ll includes a plurali y of pre i usly drilled h les 19 whi h hve left a burr 2i) pr ecting upwardly from the w rk-piece aroun eachhole. In operation of the deburring tool, platen 2 is lowered therebybringing outer end 12 of each blade into contact with the work-piece.The blades and the workpiece should be so positioned relative to eachother than when the blades first contact the work-piece cutting edge ofeach blade is at a location just inside the edge of a hole 19, with tipportions 13 straddling the hole, and with curved surfaces 14 inengagement with the work- 2,694,343 Patented Nov. 16, 1954 piece. Asplaten 2 continues in its downward movement blades are deflectedoutwardly (to the position shown in phantom in Fig. 3) thereby slidingthe blades along the surface of the work-piece, with curved surfaces 14acting as bearing surfaces for the blades. As this action takes placecutting edges 15 cut off burrs 20 as illustrated in Fig. 4, and leavethe surface of the work-piece free of upward projections. It can be seenthat this deburring tool in one operation can remove the burrs fromalmost any number of holes. In addition the work-piece is mounted in avery simple manner in the tool requiring no special clamps orcomplicated holding fixtures.

In carrying out the deburring operation with this tool, blades 7 shouldbe arranged so that cutting edge 15 is in the neighborhood of onesixteenth of an inch from the edge of the hole when initial contact ismade with the workpiece. Such a location will assure removal of all ofthe burr with an even cut and with no gouging. It is preferable also toarrange the blades so that they will simultaneously make their initialcontact with the work-piece. Otherwise, unless supporting base 5 is veryheavy, a deflection of the supporting base will take place after thefirst blades have contacted the work-piece, which may cause gouging bythe cutting edge when the other blades ave come in contact with thework-piece.

If desired, the tool may be constructed so that blades 7 are adinstablerelative to support base 5 which will allow the tool to be used indeburring various sizes and types of work-pieces. One manner ofaccomplishing this feature of adiustability is shown in Fig. 5. Here aplurality of tapped holes 21 are provided for receiving screws 8 inmounting the blades. The attaching portion 9 of each blade is providedwith an elongated slot 22 which may receive a screw 8. The proper hole21 may be selected for each blade so that cutting edge 14 will be inapproximate alignment with a burr to be removed. Further positioning ofthe blade may be obtained by means of slot 22, and the blade may beswiveled for additional adiustment to a location such as shown inphantom in Fig. 5.

It should be obvi us fr m the foregoing description that the tool iseuually applicable for cutting proiections of a nature other than burrsfrom a workiece. As many blades as desired may be used and thework-piece need not present a surface parallel to sup orting base 5 inorder for satisfactory cu ing action b the bl des. The latterarrangement is illustrated in Fi 6 and it sh uld be noted that for sucharrangements shank porti n 10 ag in makes an angle other than with thesurface of the workpiece so that portions 14 and 15 of the blade mayfunction properly.

It is not necessary for b ades 7 t extend outwardly from a centralpositi n. as sh wn in Fig. l. n s me instances the contour of thework-piece may make it desirable to pivot the blades so that some r allf he bl es extend inwardly r are at some other p siti n. The angle of shnk 10 rel ive to the work-niece must. f course. be other than 90 for alllocati ns of b ades 7.

Alth u h this inventi n has been described ab ve in detail. it sh uld heclearly understood th t. the same is by Way of illustrati n only and notto be taken by way of limi ation. the s irit and scope f this inventionbeing limite nly by the appended claims.

T claim:

A deburrirlg tool comnrising a movable nlaten: a lk SUDD"TiiY12 mem erad ed in snnnnrt \rmrkmdere thereon; and a plurality of blade membersdepending downwardly and outwardly from s id platen. the ou er end ofeach of said blade members includin a cutting edge and a bearingsurface, whereby unon vertical movement of said platen relative to saidwork supporting memher said bearing surfaces enga e such a work-pieceand slide outwardly thereon and said cutting ed es remove upwardlyprojecting portions from said work-piece.

2. A device as recited in claim 1 including in addition means foradiusting said blade members relative to said platen for alignment withsaid upwardly projecting portions, and in which said blade members arearranged to simultaneously contact said work-piece.

3. A deburring tool comprising a work supporting member adapted tosupport a work-piece thereon; a platen; said platen being movablerelative to said work supporting member; and a plnrality'of elongatedresilient blade members depending from saidplaten at an angleother than90 relative to said work-piece, each of said blade members including arounded end portion adapted to en gage. suchla work-piece and.slidethereon upon movement of said platen toward .saiduworksupportingtmember, each of said end portions-being provided with arecessed sharpened edge for removing projectionsifrom said workpiece.

4. A deburring tool comprising a platen; a work supporting memberadapted to supporta work-piece thereon; said platen being movablerelative to said work supporting member; and a plurality of bladememberssecured to andcarried by said platen whereby said blademembers dependdownwardly and outwardly therefrom each of said blademembers includingan elongated resilient .portion and aYrounded bifurcated end portion,said end portion including a sharpened cutting edge recessed therein,said blade-members being so arranged that upon movement of said platentoward said work supporting member said end portionssimultaneously-contact such a work-piece and slide outwardly thereonthereby deflecting said elongatedlr esilient portion and causing saidcutting edge to remove burrs projecting from said work-piece.

5. A deburringtool comprising a platen; a work supporting member belowsaid platen adaptedto support a work-piece thereon, the uppersurfaceof-such a workpiece including a plurality of burrs projectingtherefrom; a plurality of elongated resilient blades; andlmeans .foradjustably securing said blades to said'platenl whereby said .bladesdepend downwardly at an angle otherthan 90 relative to said uppersurface of a work-piece onsaid work supporting member and at positionscorresponding to ..the.location .of v.burrs on said workfpieceleach of-said blades terminating in a bifurcated end portion defined by twoupturned tip portions;and a cutting edge disposed therebetween at thebase thereof; said platen being movable downwardly, thereby bringingsaid end portions into engagement with said surface and deflecting saidblades whereby said base portions slide laterally thereon and saidcutting edges remove said burrs therefrom.

6. A deburring tool comprising a platen; a work supporting memberadapted to support a workpiece thereon; and a plurality of cuttingmembers depending downwardly and angularly from said platen, said platenbeing vertically movablerelative to said supporting'member, each of saidcutting members including a bearing portion and a cutting portion, saidbearing portion being brought into engagement with such a workpiece byvertical movement of said platen, and said cutting members beingthereupon shifted laterally along such a workpiece whereby'said cuttingportions remove upwardly projecting. portions from said workpiece.

References Cited in the file of this patent UNITED STATES PATENTS'Number Name Date 181,279 Perkins .Aug; 22, 1876 2,015,955 Morton Oct..1, 1935 FOREIGN PATENTS Number Country Date 302,341 Germany .Dec. 15,1917

